Switch



S. E. PERKINS.

SWITCH. APPLICATION FILED-Annie. 1919.

Patented May 18, 1920.

ii -Cw.

citizen of the United States, residing UNITED STATES PATENT OFFICE.

arm a reams or wuwoo, row essrenon m mums rnrcrmc noon CONTROL COQOF WATEBLOO, IOWA- SWITCH.

' lpedfieaticn of Letters Patent.

Patented May18, 1920.

Application am A ril 26,1919. Serial no. 292,929,

To all whom it may concern:

it known that I, SETH E. PERKINS, a

Waterloo in the county of Blackhawk and State of iowa, have invented a new and useful Switch, of which the following is a specification.

This invention relates to improvements in switches, the object of the invention being to provide an improvedreversing switch for in connection with small motors employed in operations in which the direction v of motion must be periodically reversed, and

"which switch is automatic in its action.

A further object of the invention is to provide a switch of the character set forth which is comparatively simple in construcnslve to manuiacture and highly eific ent' in operation.

view, which will appear as the description oceeds. the invention consists in the novel gatures of construction and combination of parts which will be more fully described hereinafter 'and particularly pointed out in the claims. Y Y

In the drawings aceompanying'and'formini part of this specification,

um 1 is a plan view of my improved switch, illustrating the neutral position of Pa 1 2 that smaller scale, showing the parts reds; and

-. 2 and 3 are similar views, on a somevely in the positions they'occupy when "lever has been shifted to its extreme positions for reversing the motor.

dil'lliod In all of the figures the circuit is illusdiagrammatically. same characters of reference designlte the same parts in the different figures oi the drawings. I V

Referring to the drawings, 2 designates a base plate formed of some suitable insulating material. Pivotall mounted approximately at the center ogthe base plate is a reversing lever 3 having one end thereof projecting beyond the plate as at 4 and adapted't'o contact with some suitable obbtrhotion that may awing the lever on its pivot from one side to bet'llptlaced at the proper point in the travel of switch whereby to the other. The lever 3 is formed of insulating material, such for instance asfiber, and is provided adjacent to each end thereof wit a pair of contact ints4, 4 and'5, 5

"respectively. A pair 9 contact mcmbers 6,

with the foregoing and other objects in the base 6' are provided at each end of the base plate, one at each side of the lever 3, a pair of' pivoted blades 7, 7' being adapted to establish electrical connection between the contact members 6, 6 respectively, the blades being held in contact-making position by means of helical springs 8, 8', each of whic is secured at one end to the base plate 2 and at its opposite end to a clevis 9, '9 pivotally connected respectively to the blades 7 7'. For the purpose of throwingbethe'blades T out of contact with the mem rs 6, 6 at one end of the base board or plate 2, I provide on the inner longitudinal edge of each blade a cam portion 10, and the lever 3 is provided at each side of its'pivotal point with a later- I Each of the blades is provided'near one end t er o With a laterally extending pin 12,

and a rocking bar 13 is pivotally supported approximately at the center of mien on plate 2 and is of such length t at its ends wil the blades 7, 7 are forced outwardly and will retain the blades in such position. 'A helical spring 14 is attached at one end to the base plate and at its opposite endto the extend beneath the pins 12 when rocking bar'13 adjacent to one endthereof.

Adjacent to the opposite end of the bar 13 is secured a bracket 15 carrying at its lower 7 end a metallic member or weig t 16 forming an armature that is adapted to be acted i i on by an electromagnet 17. (shown bro n away) located at a suitable distance therefrom. By this construction it will be seen 7 that when the magnet is energized the 'armature 16,will be pulled downwardly, thereby rocking the bar 13 on its pivot against the the the tension of the spring 14 andcausin ends of the bar. to pass from beneat pins 12, thus permittin the blades 7, 7 vto V. be drawn inwardly under the action of the V springs 8, 8' into contact withthe contact menibers 6, 6'. The magnet is in circuit with a suitable battery or other source ofenergy (not shown), a push button being located at a convenient point forclosingsuch circuit.

The contact members 6, 6' at one end of the base plate are connected 'by'conductors 20, 20 respectively to the of a suitable source of energy, indicated at 24, or to a line wire, while a pair of-reversing conductors 23, 23 are connected at one end respectively with the contact points 4, 4' and 5 in contact respectivel 5, 5 of the lever 3 and at the other end with conductors 21, 21' respectively, leading to the motor, as shown diagrammaticall in the drawings.

e operation of the switch is as follows: The blades 7, 7 being in contact with the contact members 6, 6, with the lever 3 swung to one side, for instance to the right as shown in Fig. 3, so that the contact points 4 and 5 at opposite ends andopposite sides of the lever are in contact respectively with the contact members 6 and16' also at opposite ends and opposite sides'of the base plate. Current will now flow from the source through conductor 20, blade -7, reversin wire 23, conductor 21 to the motor, and has through conductor 21', reversing wire 23,

conductor 20 back to the source. Whe rthe lever is swun over to the opposite position,

as shown in ig. 2, with its contacts 4 and with the contacts 6' and 6 at op osite en of the base plate,

the arms 11 o the lever having meanwhile acted on the cams 10 of the blades 7, 7 and forced1such blades out of contact with the contact points 6, 6' at one end of the base andv the ends of the rocking bar 13 vin dropped in beneath the pins 112, where the circuit is held open and the motor has ceased to operate. If the push button. is now operated the electroma net will be energized, whereupon the ends ot the rocking bar 13 will be pulled from beneath the andthe blades 7, 7 permitted timing in under the action of the springs 8, ,8. into contact with the contact members 6 6', the lever remaining in the position above described. Current will now flow from the battery through conductor 20, reversing wire 23', conductor 21 to the mo- "tor,,and back throu h conductor 21, re-

versing wire 23, blade conductor 20 back to the source. It will thus be seen that as i the lever 3 is alternately swung from. left .to'right the current is directed first to one side oi the motor and then to the other,

thereby reversing the direction of motion of the motor eve time the lever is swung 'Lirom one side to t e other.

As anillustration of one of the uses to which the switch herein described maybe put may mentioned the opening and closmg of sh .or swinging doors. In such the switc is mounted on the door with end 4 projecting out in such manner that 1 it will come in contactwith some suitable obstruction placed at the extreme ends of sfthepath of travel ofthe door, and it'will be, seen that .as the projecting portionffi o :the: lever strikes the obstruction Tthe lever is thrown over to the opposite position and in pasing from one positionfto theother throws the'blades 7. 7 out of of said lever, a pairo cantact wit thereby to contact with the contact members 6, 6,

whereby the circuit is opened and the motor ceases to operate until the push button is operated to again close the circuit, and when such circuit is closed the motor rotates inthe opposite direction,- thereby to operate the door in the opposite direction.

While I have described in detail the structure herein illustrated, it isto be understood that I do not thereby limit my invention. to the precise features of construction mounted thereon, two pair'of contact memberssecured to the base plate at each side of. said lever, a pair of blades pivotally mounted on said base plate one in electrical connection with one member of each pair of contact members and adapted to normally maintain the members ofthe pair in electrical connection, means ,for permitting:

the lever to be swung on its pivot, coeperating means carried by the lever and blades for forcing said blades'out of contact with one memberof each pair of contact members, a laterally extending pin carried by eaclv of said blades, and a bar pivotally mountedon said baseplate and adapted to contact with said pins thereby to maintain the blades out of contact with the contact members.

2. A device of the class described, comprising a base plate, a lever pivotally mounted thereon, two pair ofvcontact members secured'to the base late at, each side blades pivotally mounted on saidbase plate one in electrical connection with one member of each pair of contact members and adapted to normally maintain the members of the pair in electrical connection, means'for permitting the lever to be swung on its pivot, coiiperating means carried by the lever and blades for forcing said bladesout of contact with one member of each pair of contact-blades, a laterallyextending pin carried by each 'of said blades, 3. bar pivotally mounted on said base plate and :adapted to contactwith said pinsthereb to maintainthe blades out of the contact members, and an electromagnet adapted to operate said bar cause the same to release said blades; 7 7

3. A device of the class described, comprising a base plate, a lever pivotally mounted thereon, two pair of contact mem bers secured tothe base of said lever, a pair 0 laite at each side b ades pivotally Ill . a bar mounted on said base plate one in electrical connection with one member of each pair of contact members, a spring adapted to normally maintain each of the blades in contact with the other contact member of the pair, means for permitting the lever to be swung on its pivot, a cam formed on each of said blades, and laterally extending arms carried by the lever and adapted to act on said cams thereby to force each of said blades out of contact with one of the contact members.

4. A device of the class described, comprising a base plate, a lever pivotally mounted thereon, two pair of contact members secured to the base plate at each side of said lever, a pair of blades pivotally mounted on said base plate one in electrical connection with one member of each pair of contact members, a spring adapted to normally maintain each of the blades in contactwith the other contact member of the pair, means for permitting the lever to be swu on its ivot, cooperating means carried said ever and blades for forcing said b ades out of contact with one member of each pair of contact members, a laterally extending pin carried by each of said blades,

and a apted to contact with said pins thereby to maintain the blades out of contact with the contact members, and a spring secured to said bar and adapted to maintain V the same in contact with said pins.

5. A device of the class described, comprising a base plate, a lever pivotally mounted thereon, two pair of contact mem bers secured to the base plate at each side of said lever, a pair of blades pivotally mounted on said base plate one in electrical ivotally mounted on said base plate connection with one member of each pair of contact members, a spring adapted to normally maintain each of the blades in contact with the other contact member of the pair, means for permittin thelever to be swun on its pivot, a cam ormed on each of sai blades, laterally .extending arms carriedby the lever and adapted to act on said cams thereby to force each of said blades out of contact with one of the contact members, a laterally extending pin carried by each of said blades, a bar pivotally mounted on said base plate and adapted to contact with said pins thereby to maintain the. blades outlof contact with the contact members, a spring adapted to maintain said bar in contact wit said pins, and an electromagnet adapted to operate said bar thereby to cause the same to release said pins.

6. A device of the class described, comprising a base plate, a lever pivoted to the base plate, intermediate the length thereof,

a pair of contact members supported on the base plate, adjacent each end of thelever, contact members carried by the lever, means for moving the lever to complete a circuit between the contact members of the lever and contact members on the base member,

and electrically controlled means for com pleting a circuit between the contact members of the base plate, and a source of the electric supply. c f

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses.

. SETH E. PERKINS.

Witnesses: I HORACE GILBERT, RENO R. REEVE. 

